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### Incomprehensible substance: information traveling faster than light? [duplicate]

Say I'm holding a rod composed of an incomprehensible solid, and this solid rod is 1 light second long. Then say I poke you with the rod and at the same time I flash a light on you. If light is the ...
85 views

### Pulling a Metal Bar in Space [duplicate]

Let's say I have a metal bar (which does not expand or contract at all) that's 1 light-second long which is connected to a block at the end. I am in space holding the other end of the bar. If I pull ...
59 views

### Moving a 2x2 the length of the solar system [duplicate]

If we were able to push a 2x2 piece of wood that is the length of our solar system, how would it behave? My colleague says since its all part of the same molecular structure, the whole piece of wood ...
56 views

### Faster than light morse code v2 [duplicate]

Imagine a theoretical superhard steel cylinder pointed towards the moon , 1 cm in radius and 380,000 km long, traveling at 1km per hour towards the moon. Parallel to this cylinder, 1 meter away we ...
53 views

### What's the speed of force? [duplicate]

Brain storm: Suppose we have a perfect lever, which has 0 quality, and perfect rigidity. It is long enough that can reach Proxima Centauri from the earth. Someone push one side of lever from Proxima ...
67 views

### If I turn the tip of a 100 light years long pencil, the other end instantly turns , or it takes 100 years? [duplicate]

If a civilization could build a strong , lightweight tube, hundreds of thousands of kilometers long , could theoretically use it to communicate faster than light, simply by rotating it at one end , ...
65 views

### Speed of Light & Distance [duplicate]

If I have a transmitter that signals a relay which turns off a light off which is 300 000 km away – it has travelled at the speed of light. If I connected a rope (which does not stretch) which is ...
48 views

### What happens if you push a lot of (ideal) balls that are perfectly aligned? [duplicate]

Assume the line of balls is 2 light years long. When I push the first ball, will the last one react instantaneously? This would break the light speed limit. I'm pretty sure the answer is no, but I don'...
33 views

### How quickly is momentum transferred through an object? [duplicate]

If there was a pole, that was a light year long, out in space. (Away from all physical interference.) If we pushed one end of it, would the other end move instantly? And does it's speed depend on ...
32 views

### A question regarding information [duplicate]

Consider a continuous system of cogs which extend from the sun to the earth. Light takes eight minutes to reach the earth. However, if one was to rotate the initial cog(near the sun) then the all the ...
67 views

### Is it true that whenever any non rigid body moves, there must be a delay between the ends? [duplicate]

Very sorry if this is still considered a duplicate to this, but unfortunately the answer to this question cannot address this because mine is a nonrigid body and involve biological locomotion concepts ...
51 views

### How the effect travel's? [duplicate]

Let us assume that we placed lot's of ball touching each other in a hollow cylindrical tube, now if we push one ball at the end the ball at the other end move's instantly. So how do the information ...
65 views

### can we break the speed of light [duplicate]

I know this is impossible but I just want to know where I went wrong. here's my proposal: Let us imagine that we have a source of light and a switch that are far one light year from us. so it would ...
63 views

### Information Propagation at the Speed of Light [duplicate]

Imagine a thought experiment: You have a rod 10 ft or 10 light nanoseconds long. On each side you have perfectly synchronized super high-speed cameras looking at the surface of the rod. You rotate ...
75 views

### Could this be faster than the speed of light? [duplicate]

Let's say that I have some type of long bar. It is perfectly incompressible. On one side I have a sensor that detects any force. On the other end, I hit the bar with a hammer. From the moment my ...

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